It provides moderate speed data transfer, by using unused TDMA channels in for example the GSM system. In the future, it is expected that low cost voice over IP will be made available in cell phones.ĢG cellular systems combined with GPRS is often described as ' 2.5G', that is, a technology between the second ( 2G) and third ( 3G) generations of mobile telephony. GPRS can be utilized for services such as WAP access, SMS and MMS, but also for Internet communication services such as email and web access. GPRS data transfer is typically charged per megabyte of transferred data, while data communication via traditional circuit switching is billed per minute of connection time, independent of whether the user has actually transferred data or he has been in an idle state. General Packet Radio Service (GPRS) is a Mobile Data Service available to users of GSM and IS-136 mobile phones.
